docs: def cli(env, volume_id, notes):
      """Creates a snapshot on a given volume"""
      file_storage_manager = SoftLayer.FileStorageManager(env.client)
      snapshot = file_storage_manager.create_snapshot(volume_id, notes=notes)
  
      if 'id' in snapshot:
          click.echo('New snapshot created with id: %s' % snapshot['id'])
      else:
          click.echo('Error occurred while creating snapshot.\n'
                     'Ensure volume is not failed over or in another '
                     'state which prevents taking snapshots.')